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P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT (CONTINUED) 5. TONE WHEEL/FLEX PLATE INSPECTION Turn the ignition off. Carefully disconnect the Negative Battery (Ground) cable. Remove the Crankshaft Position Sensor. Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive movement. Were any problems found? Yes >> Repair or replace the Tone Wheel/Flex Plate as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 6 6. CHECKING CAMSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE Install the CKP Sensor and connect the battery cable. NOTE: An intermittent condition in the Cam Position Sensor can cause the P0339 to set. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands Wiggle the related wire harness and lightly tap on the Cam Position Sensor. Observe the lab scope screen. Start the engine. Observe the lab scope screen. Are there any irregular or missing signals? Yes >> Replace the Cam Position Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 7 7. CRANKSHAFT POSITION SENSOR If there are no possible causes remaining, view repair. Repair Replace the Crankshaft Position Sensor. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 418 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |